Table 1. Comparison of different methods.

	Single side access system [4]	Whole body system [5]	Bi-direction scanning [6]	Slit PAT [7]	CWFL
Scanning method	Continuous and simultaneous rotation and translation scan	180-degree rotational scan + translational scan at each 1.5 degree interval	2 translational scan perpendicular to each other	1 translational scan	1 translational scan
Acquisition time (min)	5.12	80.00	2.67	0.20	0.20
Modification of transducer array	No	No	No	Yes (slit)	No
SNR	High	High	High	Low	High
Depth of field	Small	Small	Small	Medium	Large
SRF	1.14	0.0366	3.48	16.2	4.56